Coil holder for wireless signaling systems



Jan; 4 9

A. H. CURTIS ETAL COIL HOLDER FOR WIRELESS SIGNALING SYSTEMS 1923 2 Sheets-Sheet 1 7 Filed August 2.

1927 1,613,222 4 A. H. CURTIS Er AL COIL HOLDER FOR WIRELESS SIGNALING SYSTEMS 2 Sheets-Sheet 2 Filed August 2. 1923 Patented Jan. 4, 1927.

UNITED STATES PATENT OFFICE.

ARTHUR HERBERT CURTIS, STANLEY ROBERT WEIGHT, AND ALFRED HENRY MACKLEY, F BEDFORD, ENGLAND.

COIL HOLDER FOR WIRELESS SIGNALING SYSTEMS.

Application filed August 2, 1923, Serial No. 655,381, and in Great Britain August 8, 1922.

This invention relates to coil holders for wireless signaling systems and has reference particularly to the holders for the inductance coils 01": wireless receiving sets.

The object of the present invention is to provide a coil holder such as will accommodate any size and form of coil and in which the terminals on the coils and support will be widely separated thus diminishing the possibilities ol. leakage and can be adjusted relatively to each other in parallelism at dif l'crent distances apart.

Moreover it is proposed to provide means for directly adjusting the coils relatively to each other by hand and in addition to provide a microadjusting means for fine adjustment.

The invention consists broadly of an inductance coil provided with means whereby its angular position about a transverse axis can be adjusted independently of any move ment of the coil supports.

A further feature of the invention comprises a multiple coil variable inductance having two or'more coils and provided with means for adjusting the relative positions of their coil supports, wherein means are provided whereby such relative position and angular position of each coil relatively to its supports can be adjusted separately or simultaneously.

According to a further feature of the invention the terminals of angularly adjustable inductance coils pivotally supported on giiiubals arranged transversely 'to their axes are passed through the gimbals.

Various embodiments ofthe invention are illustrated by the accompanying drawings wherein Figure 1 is a perspective view of a holder of a three coil variable inductance.

Figure 2 is a perspective view of a coil support mounted on a standard terminal socket plug.

Figure 3 is a fragmentary view of a modilication oi a gimbal mounted coil.

Figure at is a modified coil gimbal mounting.

Figure is a perspective view of a handle tor adjusting the angle of the coil on its support.

Figure 6 is a fragmentary view illustrating a friction gear adjustment of the angular possition of the coil in its holder.

Figure 7-i's a perspective viewillustrating flexible shaft mechanism for adjusting the angular position of the coil in its holder.

ln'these drawings and 21 are the metal coil-supports each of which is provided at its upper end with a gimbal supporting hole or recess 23 adapted to receive a metal gimhal 24 of which a pair are secured at diametri cally opposite sides of a coil 25 so that the coil can be tilted or adjusted about a transverse axis passing through the gimbals.

Each pair of coil supports 20 and 21 is adjustably mounted on a carrier rod 26 of insulating material which in Figure 1 is fixed vertically in a base 27. The lower portion of the coil supports 20 and 21 is formed a saddle fitting on the carrier rod 26 and provided with turned in ends adapted to slide in grooves 29 formed in opposite sides of the carrier rod 26. The two sides of the saddle end of the coil supports 20 and 21 are held together to hold the turned in ends 30 in the grooves 29 by means of screws 31. each of which screws into a distance piece 32 arranged between sides 35 extending from the lower ends of the supports 20 and 21. In the other end of each distance piece 32 is screwed a screw 36 in the head of which is drilled a hole 37 for the reception of the ends of the wire of" the electric circuit, a bent spring plate heldby the screws 36 to the sides 35 and of which the free end is per- 'i'orated to move freely on the head of the screw, being arranged to hold such wire when threaded through the hole 37. In the distance piece 32 is also drilled a hole 39 for the reception of the wires when required.

Each of the two outer coil support carriers 26 is movable angularly about its pivot by-me'ans of a hand lever 40. The lower end of this hand lever s0 has a clip 41 adapted to he held on the carrier 26 by means of a.

above that the distance between the coil supports 20 and 21 can be adjusted along the carrier 26 to take coils of different diameters and that the posit-ion of the-coil along the carrier rod 26 can al o be adjusted by moving both supports along it until the coil is in the desired position. Also each of the supports 20 and 21 forms a terminal for one end of the coil winding, the ends of the wires of the electric circuit being passed through holes 37 in the screws 36, so that the terminals will be a considc able distance apart.

The coil supports 20 and 21 may conveniently consist of resilient bars projecting horizontally from the carrier 26 and of suflicient resiliency to permit of the coils being pressed or forced between them so that the gimbals on the coilswhich are electrically connected to the coil terminalswill engage in bearings or recesses in them.

Instead of the coil supports 20 and 21 extending directly from the carrier rod they may be carried by an adapter fitted with a plug for use with a coil holder of standard form. In Figure 2 is shown an adapter in which the coil supports 20 and 21 are adj ust ably mount-ed on oppositely disposed carrier slides and 51 having bracl-zet like ends 52 secured at opposite sides of a block of insulating material Si by means of screws 55. the block S 1 being provided 'ith standard terminal plug and socket member 56 and 57.

The adjustment of the coil supports 20 and 21 in Figure 2 is the same as described with reference to Figure 1, the corresponding details having the same reference numerals.

The horizontally projecting terminal holders aforesaid will be capable of rotation about their vertical axes so that the coils can be swung away from a stationary coil for the purpose of varying the inductance in well known manner but by reason of the gimbal support of the coils themselves these coils can also be adjusted to parallelism or any desired degree out of parallelism as may be desired and this in itself will provide a means for very accurate adjustment in the electrical sense. liloreover, by the use of coils of ditl'erent diameters angular adjustment of one coil within or partly within the other may be provided for.

Figure 3 illustrates a mounting for narrow type of coil. In this example the coil 25 is mounted in a recess on one side of a hollow tube 63 of insulating material. The gimbals Zllo which the ends of the coil winding are connected are in the form of round headed screws screwed into the ends of the tube 6?. These gimbals are sprung iuto recesses 23 formed in the coil supports 20 and 21. In Figure l is shown a modified form of coil mounting consisting of gimbals 2-l secured to base plates 6% held on the coil 25 by means of bent-over strips 65, the inner side of the plate being provided with extensions 66 arranged to form socket-s for the reception of a diametrically arranged strut of insulating material 68 of rectangular cross section. In this case a fork shaped lever 67, Figure 5 may be used to adjust the angular position of the coil when mounted in its supports, the fork being arranged to fit over the .sides of the strut ($8 in the manner of a spanner.

In the friction gear for effecting the angular adjustment of the coil on the supports 20 and 21 as shown in Figure 6 the operating hand lever all) is rotatively mounted in bearlugs 70 and 71 secured to the support 20. A friction pulley 72 secured on the rotary hand lever 40 is arranged to engage a friction disc Tl secured to the coil In Figure 7 is shown a modification of the coil tilting or adjusting gear wherein the friction gearing is substituted by a flexible shaft '7 in the form of acoiled spring connected at one end to the gimbal 2-1- and at the other end to the end of the rotary hand lever l0.

In each of the above examples the position of the movable coil supports is adjusted by the lateral or angular movement of the hand lever l0, while the line adjustment of the coil is effected by tilting the coil about its gimbal supports, such adjustment being an exceedingly fine one in the cases where it is effected by worm or friction gear operated by the rotation of the hand lever 40.

An instrument of the foregoing general nature is of simple and cheap construction and of very effective adjustment electrically by reason of the ability provided for adjusting the support for the coils and also for adjusting the coils themselves angularly in their supports so that a combination of two adjustments is provided.

lVhat we claim and desire to secure by Letters Patent is 1. An induction coil provided with gimbals. a pair of independent coil supports and bearings therein, and a carrier pivotally mounted on av standard, the coil gimbals bemg mounted in the bearin at the outer ends of the coil-supports while the other end of each coil-support is independently fixed to and adjustable along the pivoted carrier, the axis of the coil gimbals and that of the pivotal carrier being parallel to one another at any adjusted position of the coil supports on the carrier.

2. An inductance coil provided with metal gimbals to which are electrically connected the coil terminals, apair of metal coil-sup-- ports and bearings therein. and a carrier of insulating material pivotally mounted on a standard, the coil gimbals being mounted in the bearings at the outer ends of the coil supports while the other end of each coilsupport is independently fixed to and adj ustable along the pivoted carrier, the axis of the coil gimbals and that of the pivotal carrier being parallel to one another at any adjusted position of the coil supports on the carrier.

3. An inductance coil provided with metal gimbals to which are electrically connected the coil terminals, a pair of metal coilsupports and bearings therein, a pair of electric lead terminals, and a carrier of insulating l'i'iaterial pivotally mounted on a standard, the coil gimbals being mounted in the bearings the outer ends of the coil supports while the other end of each coil support is independently fixed to and adjustable along the pivotal carrier, and the electric lead terminals carried by the coil supports.

4. An inductance coil provided with gimbals, a pair of coil-supports and bearings therein, and a carrier pivotally mounted on a standard, the coil gimbals being mounted in the bearings at the outer ends of the coil supports while the other ends of the coil-supports are adjustably fixed to the pivoted carrier so that their positions thereon can be varied.

5. An inductance coil provided with metal gimbals about which its angular position can be varied by hand and to which are electrically connected the coil terminals, a pair of adjustable metal coil-supports and bearings therein. and a carrier of insulating material provided with an operating handle .and pivotally mounted on a standard, the coil gin1- bals being mounted in the bearings at the outer ends of the coil-support s, while the other ends of the coil supports are fixed to the pivoted carrier so that the inclination of the coil can be varied independently about two axes.

6, An inductance coil provided with gimbals, a pair of coil supports and bearings therein, and a longitudinally grooved carrier pivotally mounted on a standard, the coil gimbals being mounted in the bearings at the outer ends of the coil-supports while the other ends of the coil-supports are pro vided with turned in ends fitting in the longitudinal grooves in the carrier and provided with means whereby they can be fixed at any adjusted position along the carrier.

7 An inductance coil provided with metal gimbals, a pair of stamped sheet metal coilsupports and bearings therein provided with adjusting screws, and a longitudinally grooved carrier pivotally mounted on a standard, the coil gimbals being mounted in the bearings at the outer ends of the coilsupports while the other ends of the coil supports are saddle shaped and provided with turned in ends fitting slidably in the longitudinal grooves in the carrier and held in any adjusted position therein by the adjusting screws.

In witness whereof we atfix our signatures.

ARTHUR HERBERT CURTIS. STANLEY ROBERT WRIGHT. ALFRED HENRY MACKLEY. 

